Muscle List

Masseter

ORIGIN: zygomatic arch
INSERTION: mandible
ACTION: elevates mandible

Trapezius

ORIGIN: Occipital bone and thoracic vertebrae
INSERTION: Clavicle and acromion of the scapula
ACTION: Elevate, adduct, depress, rotate scapula, elevate clavicle, extend/hyperextend the neck.

Sternocleidomastoid

ORIGIN: sternum and clavicle
INSERTION: mastoid of the skull
ACTION: Both will flex at the neck only one will turn head

Deltoid

ORIGIN: clavicle and scapula
INSERTION: humerous
ACTION: raise arm

Rectus Abdominis

ORIGIN: Pubis around symphysis
INSERTION: costal cartilage, xiphoid process
ACTION: flexes vertebral column

Biceps Brachii

ORIGIN: coracoid process of scapula
INSERTION: radius
ACTION: flex at the elbow

Triceps brachii

ORIGIN: humerous and scapula
INSERTION: ulna
ACTION: extend at the elbow

Latissimus dorsi

ORIGIN: lower thoracic vertebrae, ribs, and lumber vertebrae
INSERTION: humerous
ACTION: extend, lift, rotate shoulder

Rectus femoris

ORIGIN: ilium
INSERTION: tibia
ACTION: extend at knee, flex at the hip

Biceps femoris

ORIGIN: Ischium and femur
INSERTION: Tibia and fibula
ACTION: Flex at knee and extend and rotate at hip

Tibialis anterior

ORIGIN: tibia
INSERTION: 1st metatarsal
ACTION: flex at foot

Gastrocnemius

ORIGIN: femur
INSERTION: calcaneus
ACTION: flex the ankle, point the foot